What changed when IRI and NPD became Circana
The 2023 merger that combined IRI and NPD Group into Circana was the biggest structural shift in consumer goods measurement in a decade. IRI had long been the main U.S. challenger to Nielsen in food, beverage, and household products retail tracking. NPD brought a different capability: panel and point-of-sale coverage across non-food categories including consumer electronics, apparel, toys, and foodservice. Combining them created a vendor that could, in theory, follow the shopper across far more of their spending than either legacy business could alone.
NielsenIQ, which separated from Nielsen Media in 2021 under private equity ownership, responded by sharpening its own product portfolio and pushing harder on international coverage. Its Brandbank digital shelf content service, its NielsenIQ Discover analytics platform, and its Connect data portal have all been updated since the split. The two vendors now compete on overlapping but genuinely different terms.
Coverage: global reach vs U.S. category breadth
NielsenIQ tracks retail sales in more than 90 countries. For a manufacturer with meaningful business in Southeast Asia, Latin America, or Africa, that reach is a practical advantage, not just a branding claim. Circana's core strength sits in the United States. Its post-merger footprint extends coverage in U.S. mass, grocery, drug, club, dollar, and convenience channels, plus foodservice and specialty retail that NPD had already built relationships with. Outside the U.S., Circana has a presence in select European markets, but it is not positioned as a global-first platform the way NielsenIQ is.
If your commercial team is primarily reporting on a U.S. portfolio, both vendors can serve you. If you consolidate global reporting into one platform, NielsenIQ is the more practical choice today.
Methodology and data sourcing
Both vendors blend point-of-sale data from retailers with consumer panel data to estimate total market size including channels where they do not hold direct retailer relationships. The methodological debate between them is not new, but it has practical consequences. NielsenIQ has historically used a larger U.S. consumer panel, which supports stronger projection models in undercovered channels. Circana has invested in its receipt-based panel following the IRI legacy approach and has added NPD's purchase panel for non-food categories, giving it panel depth across a wider range of spending types.
Neither vendor publishes full methodological documentation publicly, so your data science team will need to interrogate both during any evaluation. The key questions to ask: how does each vendor handle unlicensed retailer coverage in your core channels, and how frequently is the panel refreshed?
Data product breadth
This is where the merger matters most for product teams. Circana can now offer a manufacturer of, say, protein snacks a view that connects grocery sell-out data with adjacent category trends in sports nutrition, foodservice protein demand, and consumer health spending. That cross-category intelligence is genuinely new and it was not available from IRI alone before NPD joined.
NielsenIQ's strength is depth in food, beverage, household, and personal care, with strong innovation measurement tools. Its NielsenIQ Bases service for concept and product testing is widely used by commercial and insights teams at large manufacturers. Circana does not have a direct equivalent at the same scale. If you run frequent stage-gate innovation work, that matters.
For revenue growth management specifically, both vendors now offer tools that sit alongside their measurement data, including price and promotion analytics. NielsenIQ has pushed further into revenue management software through partnerships and its own platform. Circana's RGM offer leans on its historical IRI roots, which had a strong U.S. customer base among manufacturers running trade promotion analysis.
Agency and consulting partnerships
NielsenIQ has long-standing relationships with the major retail and consulting networks. Its data underpins category management work at many large retailers globally, and it is embedded in the workflows of most large shopper and trade marketing agencies. That installed base creates switching friction for manufacturers whose retailer partners are already standardised on NielsenIQ outputs.
Circana has built agency partnerships particularly in the U.S., including relationships with media and shopper agencies that use its purchase data for audience targeting and campaign measurement. The NPD legacy brought relationships with technology and specialty retail channels that were outside IRI's traditional grocery focus.
If your agencies and retail customers are predominantly working off NielsenIQ data, changing vendors creates real alignment cost. That is a legitimate factor in your decision and not just inertia.
Pricing sensitivity and what it means for measurement
Several signals from the current market are relevant to how you use either vendor's data right now. Kraft Heinz, Procter and Gamble, and PepsiCo have all flagged consumer financial stress linked to rising fuel and food costs. Ahold Delhaize's U.S. business is navigating deflation in categories like eggs alongside reduced SNAP enrollment. Dabur India has moved to a mix of price increases and pack-size reductions to manage input inflation.
In this environment, the frequency and granularity of your sales measurement data matters more than usual. Weekly point-of-sale data that captures promotional response, pack-size mix shifts, and channel switching is not a nice-to-have when margins are under pressure. Both NielsenIQ and Circana offer weekly data, but the channel coverage in your specific retail footprint should drive the conversation, not vendor reputation alone.
Named customer signals and market positioning
Both vendors count major CPG manufacturers among their clients. Circana's IRI heritage means it has deep relationships with many of the largest U.S. food and household brands. NPD's legacy brought technology manufacturers, sporting goods companies, and specialty retailers. NielsenIQ's client base skews toward multinationals running global reporting and retailers using category management services.
Neither vendor is dominant for all use cases. Your category, your geographic footprint, and which retailers you need to align with on data are the variables that should drive the decision.